1. Forum
  2. Fidonet
  3. WEATHER

  • MESO: Mesoscale Discussion 0134

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Feb 8 20:51:41 2023
    ACUS11 KWNS 082051
    SWOMCD
    SPC MCD 082051=20
    WYZ000-090045-

    Mesoscale Discussion 0134
    NWS Storm Prediction Center Norman OK
    0251 PM CST Wed Feb 08 2023

    Areas affected...Northwest to central Wyoming

    Concerning...Snow Squall=20

    Valid 082051Z - 090045Z

    SUMMARY...A band of snow will continue to push into central Wyoming
    where environmental conditions are favorable for snow squalls.
    Periods of heavy snow, gusty winds, and reduced visibility will be
    possible through the late afternoon hours.

    DISCUSSION...Recent web cams and surface observations from northern
    and northwestern WY show reduced visibility down to 1/4 mile
    coincident with the passage of a narrow snow band associated with a
    surface trough. Recent RAP mesoanalysis reveals 0-3 km lapse rates
    near 8-9 C/km, and forecast soundings suggest these lapse rates may
    extend up to the 500-400 mb layer. This will support downward mixing
    of stronger flow aloft (manifesting as gusts up to 30-40 mph) and is
    supporting 100-250 J/kg SBCAPE. This buoyancy will maintain a
    convective element to the snow band, which is favorable for brief
    periods of heavy snowfall. This environment extends well into
    central WY, which will maintain the potential for snow squalls
    through the late afternoon hours.

    ..Moore.. 02/08/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4iPVsZsEA3eSmAm1WClkNs4m5OKuBe9BZfESmEPoNSsjeDIW86kGczbFmWl-vdBVgXCFaVZ9t= -hbAeCJp1DCcTcvR9U$ for graphic product...

    ATTN...WFO...UNR...CYS...BYZ...RIW...

    LAT...LON 43301028 43810915 44690772 44390589 43680574 42920625
    42470720 42040815 41940913 42130982 42581031 42901040
    43301028=20


    =3D =3D =3D
    To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

    --- SBBSecho 3.14-Linux
    * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)
  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Feb 12 00:06:13 2024
    ACUS11 KWNS 120006
    SWOMCD
    SPC MCD 120005=20
    MSZ000-LAZ000-120130-

    Mesoscale Discussion 0134
    NWS Storm Prediction Center Norman OK
    0605 PM CST Sun Feb 11 2024

    Areas affected...Parts of LA into central/southern MS

    Concerning...Tornado Watch 20...

    Valid 120005Z - 120130Z

    The severe weather threat for Tornado Watch 20 continues.

    SUMMARY...Large hail will continue to be the primary threat north of
    an outflow boundary. Storm development remains possible near/south
    of the boundary this evening, which would potentially pose a tornado
    threat in addition to hail and damaging-wind potential. New watch
    issuance is possible prior to the expiration of WW 20.

    DISCUSSION...An outflow boundary extends from southwest LA into
    southern MS early this evening. Ongoing convection is largely
    elevated and focused north of the boundary, but MUCAPE of 500-1000
    J/kg and strong deep-layer shear are supporting elevated supercell
    potential, which will continue to pose a large hail threat through
    much of the evening.=20

    The composite outflow continues to sag slowly southward, especially
    in areas where convection is in close proximity to the boundary. In
    the near term, this tendency will limit potential for surface-based
    convection. However, increasing large-scale ascent attendant to an
    approaching mid/upper-low over the southern Plains may allow for
    increasing storm potential near/south of the boundary later this
    evening. Strengthening low-level flow/shear would support some
    tornado potential if surface-based convection can be sustained
    across parts of southern LA/MS.=20

    With some severe threat likely to persist through much of the
    evening, new watch issuance is possible prior to the 01Z expiration
    of WW 20.

    ..Dean/Hart.. 02/12/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6-G16mNJLFBh2JVfgpTGl7Kd4FKbzkyk5jRpsuEc3ojuVaTc-QkMqhITcgeO9M9gWEBD6ysKv= CWbAb7ozdXIoEgd0_A$ for graphic product...

    ATTN...WFO...JAN...LIX...LCH...SHV...

    LAT...LON 30929317 31439221 32569035 32778987 32848916 32628885
    32218881 31848897 31408924 30918978 30739018 30589066
    30389131 30169227 30199293 30329356 30929317=20


    =3D =3D =3D
    To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

    --- SBBSecho 3.14-Linux
    * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)